Siemens SINUMERIK 840D sl Function Manual page 199

DB21, ... DBX377.6 (circular travel in JOG active)
Note
Activation is not possible:
● during an NCK reset
● In case of impending emergency stop
● During processing of an ASUP
● If at least one of the participating axes is already being traversed
● If PTP travel is active
● During active Cartesian manual traversing with generic transformation
No alarm message occurs. Delayed activation takes place after closure or after
acknowledgement of the active function.
Sequence
After activating the function, the tool can be traversed by means of a continuous or incremental
JOG motion using traverse keys or a handwheel:
● For a JOG movement request for the 1st geometry axis of the active plane, traversing is
done from the current position via a concentric arc with the same center point as for the
defined arc.
● For a JOG movement request for the 2nd geometry axis of the active plane, traversing is
done perpendicular to the defined arc. As a result, the circle radius changes.
● Only one movement at a time can be carried out in the active plane: either on the arc or
perpendicular to it.
● Regardless of the movements in the active plane, the 3rd geometry axis can be traversed
perpendicular to the active plane.
Note
The radius can only be reduced to zero, i.e. to the center point of the circle. If the radius is then
enlarged again, traversing occurs back in the direction from where the reducing started.
Note
If the current position is the center point of the circle when the function is activated or after a
change to the center point of the circle, then the following applies:
● For a full circle, traversing takes place in the direction of the 2nd geometry axes.
● For a segment of a circle, travel is in the direction of the angle bisector.
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
H1: Manual and handwheel travel
4.11 Circular travel in JOG
199